Electric plug



FIG. 1 is a perspective view of an electric plug showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a front elevational view thereof (of which a rear elevational view would be a mirror image); and

FIG. 5 is a right side elevational view thereof (of which a left side elevational view would be a mirror image). 

The ornamental design for an electric plug, as shown and described. 